Pet KONG Hedgehog Refillable Catnip Toy, Colors Vary, Contains top quality natural catnip Supply Store/Shop KONG refillable catnip toys utilize top quality, natural North American catnip. These toys have a special compartment that can be opened and closed. Fresh catnip can be added again and again to last all of your cat's nine lives. Catnip is a natural, non-addicting herb that encourages play in about 70% of cats. or utmost kitty enjoyment, gently twist the filled toy to release catnips' herbal oils.